IJ Technologies, for one. Otherwise it's pretty thin pickin's for 64" aqueous canvas. Was just trying out one of their Diamond Gloss canvas sample rolls, which suggests an above average manufacturing quality.

I have been testing it recently, but haven't come to any firm conclusion yet. It prints well, has a good dMax, and the surface is resilient. The only problem I have had with it is the amount of cotton dust wrapped with it. I have to pull the length I want through the printer and dust it off before printing.